Date: Sat, 8 Jul 2000 10:29:17 -0700 (PDT) From: Tom Samplonius <tom@sdf.com> To: "R.I.Pienaar" <rip@pinetec.co.za> Cc: Gabriel Ambuehl <gabriel_ambuehl@buz.ch>, Jason Fesler <jfesler@gigo.com>, Luigi Rizzo <luigi@info.iet.unipi.it>, Chris Shenton <cshenton@uucom.com>, Alan Batie <batie@rdrop.com>, isp@FreeBSD.ORG Subject: Re: load balancing Message-ID: <Pine.BSF.4.05.10007081026560.5054-100000@misery.sdf.com> In-Reply-To: <20000708183736.A16123@pinetec.co.za>
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On Sat, 8 Jul 2000, R.I.Pienaar wrote: > On Sat Jul 08, 2000 at 08:58:17AM -0700, Tom Samplonius wrote: > > > > Foundry Networks makes a load-balancer box that is able to keep itself > > synced with another unit for both fail-over and load-balancing. The unit > > balances requests to whatever backend servers you have, and if one of the > > backend servers croaks, the Foundry unit stops sending requests to it. > > This solution give you complete backend and frontend redunancy. > > how does it monitor the boxes behind the load blanacer, when does it find out > that your box died and its ment to failover? Because the backend server will no longer respond! Remember load-balancers are just fancy NAT boxes. If a request is translated, and there is no response, the server is dead. Load-balances like those from Foundry Networks also measure the response time. If a particular backend server starts to respond more slowly, the load-balancer will give it less requests. Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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